if the stream is interrupted due to a failure the StatusOr<spanner::Row> contains the error. The function returns a successful StatusOr<> with an empty spanner::Row to indicate end-of-stream.
Metadata()
Returns metadata about the result set, such as the field types and the transaction id created by the request.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["This document details the `ResultSourceInterface` for Google Cloud Spanner, specifically for version 2.11.0, up to the latest release 2.37.0-rc."],["The `ResultSourceInterface` defines how to interact with a stream of `Rows` from Spanner, typically resulting from a `Read()` or `ExecuteQuery()` operation."],["The `NextRow()` function retrieves the subsequent row in the stream and can return an error `StatusOr` if the stream fails, or a successful empty `Row` to signal the end of the stream."],["`Metadata()` and `Stats()` functions provide details about the result set, such as field types, transaction IDs, the number of rows, and the query plan used."],["The `RowStream` class, which this interface is for, is designed to be mockable, allowing for testing of `Client` behaviors."]]],[]]
